Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 180
rm theposition the needles take up at any point. On one side of theloop all the whirls enter it in the same direction, and emergefrom the opposite side as is further shown in Fig. 140. 172. Magnetic Field at the Centre of a Circular Cur-rent.—If a magnetic body, A, Fig. 140, be held above… … through itself the greatest number of lines of force of the cur-rents field, ^[ 43. There will be the same tendency in B, Fig.141, where the current is flowing in a rectangular circuit;but it will be seen frominspection of the twofigures that manymore of the currentslines act upon themagnetic body,…
Electricity · Magnetism
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